Chainataun

Kim Go-eun plays Ma Il-young who as a baby was left in a coin locker at a train station and found by vagrants who look after her. As a child she is taken by a corrupt police officer to Ma Woo-hee played by Kim Hyo-seo to pay of his gambling debt. Woo-hee is also called Mother by the people who work for her as she has taken them all in, although the moneylending business she runs is also in the trade of organ harvesting when people cannot pay. Go-eun happily carries out her violent roll in this set up until she meets Park Seok-hyun played by Park Bo-gum and instead of dealing with him develops feelings for him. Then the situation spirals out of control with friend fighting friend in a bloody, violent climax. It is quite violent and dark and once it starts doesn't let up but excellent drama about a desperately sad underbelly of people.